[Xen-devel] [PATCH 7/7] Test harness for new printk formatting

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

---
 xen/arch/x86/irq.c |   36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/xen/arch/x86/irq.c b/xen/arch/x86/irq.c
index c2e5629..68a956c 100644
--- a/xen/arch/x86/irq.c
+++ b/xen/arch/x86/irq.c
@@ -2485,3 +2485,39 @@ bool_t hvm_domain_use_pirq(const struct domain *d, const 
struct pirq *pirq)
     return is_hvm_domain(d) && pirq &&
            pirq->arch.hvm.emuirq != IRQ_UNBOUND; 
 }
+
+static void test_printk(unsigned char key)
+{
+    char buffer[8] = { 0 };
+    char buffer2[3] = { 0 };
+
+    printk("In %s()\n", __func__);
+    printk("Some symbols: '%ps' '%pS'\n", _p(printk), _p(printk));
+    printk("More symbols: '%ps' '%pS'\n", _p(test_printk), _p(test_printk));
+    printk("Invalid: '%ps' '%pS'\n", _p(0x20), _p(0x20));
+    printk("Partial: '%ps' '%pS'\n", _p(((unsigned long)test_printk + 0x20)),
+           _p(((unsigned long)test_printk + 0x20)));
+
+    snprintf(buffer, sizeof buffer, "%pS", _p(test_printk));
+    printk("Test printing into 8 byte buffer '%s'\n", buffer);
+
+    snprintf(buffer, sizeof buffer, "%ps", _p(test_printk));
+    printk("Test printing into 8 byte buffer '%s'\n", buffer);
+
+    snprintf(buffer2, sizeof buffer2, "%ps",
+             _p(((unsigned long)test_printk + 0x20)));
+    printk("Test printing into 3 byte buffer '%s'\n", buffer2);
+}
+
+static struct keyhandler test_printk_keyhandler = {
+    .diagnostic = 1,
+    .u.fn = test_printk,
+    .desc = "Test new printk formatting options"
+};
+
+static int __init setup_test_printk(void)
+{
+    register_keyhandler('6', &test_printk_keyhandler);
+    return 0;
+}
+__initcall(setup_test_printk);
-- 
1.7.10.4


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